原料预处理对氢氧化钾活化法制备活性炭的影响  

Effects of raw material pretreatment on activated carbons prepared with KOH activation

作　　者：舒成[1,2] 李克健[2] 章序文[2] 周颖[1] 

机构地区：[1]大连理工大学炭素材料研究室,辽宁大连116024 [2]中国神华煤制油化工有限公司上海研究院,上海201108

出　　处：《炭素技术》2014年第2期5-8,共4页Carbon Techniques

基　　金：国家科技部863基金(2009AA05Z318)

摘　　要：以神华煤直接液化残渣为原料,采用氢氧化钾活化制备高比表面积活性炭,重点研究了不同的预处理方案对制备煤液化残渣基高比表面积活性炭的影响。实验发现:空气和硝酸钾协同预氧化处理有利于提高活性炭的比表面积和收率;硝酸钾用量是影响活性炭性能的重要因素。在一定的范围内(<20%),硝酸钾用量的增加,不仅能有效提高活性炭的微孔比表面积,还能在某种程度上有效降低活性炭的灰分,当硝酸钾用量占原料的20%时,活性炭的收率为47.07%,灰分为0.996%,碘吸附值达到1 765.6 mg/g,但硝酸钾含量进一步增加时,活性炭的碘吸附值会急剧下降,且灰分也随之上升。Activated carbons with high surface area from Shenhua direct coal liquefaction residues have been prepared by chemical activation. The effects of different pretreatment processes on the structure and properties of activated carbons were investigated. The results indicated that raw material preoxidation process of Air/KNO3 is an important process to obtain activated carbons with specific high surface area, and the content of KN03 in the pretreatment process also has a considerable influence on the specific surface area and ash content of activated carbons. When the content of KNO3 is up to 20%, the iodine value, ash content and carbon yield of activated carbons are 1 765.6 mg/g, 0.996%, and 47.07%, respectively.

关 键 词：煤直接液化残渣 活性炭 预处理 

分 类 号：TQ424.11[化学工程]